package com.itheima.controller.impl;

import com.itheima.controller.IStudentController;
import com.itheima.domain.Student;
import com.itheima.factory.Factory;
import com.itheima.service.IStudentService;
import com.itheima.service.impl.StudentServiceImpl;

import java.util.ArrayList;
import java.util.Scanner;

public class StudentControllerImpl implements IStudentController {
    //创建service对象调用service添加方法
    private IStudentService service= Factory.getStudentService();
    private Scanner sc = new Scanner(System.in);

    @Override
    public void start() {
        Scanner sc = new Scanner(System.in);
        //死循环
        loop:
        while (true) {
            // 键盘录入
            System.out.println("--------欢迎来到 <学生> 管理系统--------");
            System.out.println("请输入您的选择: 1.添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出");
            String choice = sc.next();
            //根据不同的选择做不同的事
            switch (choice) {
                case "1":
                    //System.out.println("添加成功");
                    addStudent();
                    break;
                case "2":
                    //System.out.println("删除成功");
                    deleteStudent();
                    break;
                case "3":
                    // System.out.println("修改成功");
                    updateStudent();
                    break;
                case "4":
                    // System.out.println("查看成功");
                    findAllStudents();
                    break;
                case "5":
                    System.out.println("退出学生系统");
                    // break loop;
                    return;
                default:
                    System.out.println("输入有误,请重新输入");
                    break;
            }
        }
    }

    @Override
    public void addStudent() {
        String sid = null;
        while (true) {
            System.out.println("请输入学号");
            sid = sc.next();
            boolean exists = service.isExists(sid);
            if(exists){
                System.out.println("已经存在,请重新输入");
            }else {
                break;
            }
        }
        Student student = getStudentInfo(sid);
        service.addStudent(student);
        System.out.println("添加成功");
    }

  

    @Override
    public void deleteStudent() {
        String sid = getStudentSid();
        service.deleteStudent(sid);
        System.out.println("删除成功");
    }

    

    @Override
    public void updateStudent() {
        String sid = getStudentSid();
        Student newStu = getStudentInfo(sid);
        service.updateStudent(sid,newStu);
        System.out.println("修改成功");
    }

    @Override
    public void findAllStudents() {
        ArrayList<Student> list = service.findAllStudents();
        if(list==null||list.size()==0){
            System.out.println("没有数据,请先添加");
            return;
        }
        //不是null 一次遍历
        System.out.println("学号\t姓名\t年龄\t生日");
        for (int i = 0; i < list.size(); i++) {
            Student stu = list.get(i);
            if (stu != null) {
                System.out.println(stu.getSid() + "\t" + stu.getName() + "\t" + stu.getAge() + "岁\t" + stu.getBirthday());
            }

        }

    }

    private Student getStudentInfo(String sid) {
        //录入其他信息
        System.out.println("请输入姓名");
        String name = sc.next();
        System.out.println("请输入年龄");
        int age = sc.nextInt();
        System.out.println("请输入生日");
        String birthday = sc.next();
        //封装数据
        return new Student(sid, name, age, birthday);
    }
    private String getStudentSid() {
        String sid = null;
        while (true) {
            System.out.println("请输入学号");
            sid = sc.next();
            boolean exists = service.isExists(sid);
            if(!exists){
                System.out.println("不存在,请重新输入");
            }else {
                break;
            }
        }
        return sid;
    }
}
